> If I was making a game with capture/summon mechanics and got a call from Nintendo, I would probably take capture/summon mechanics out of my game if their lawyers were threatening enough. That's the value in unenforceable patents.
It really depends? If you could hire a good patent lawyer for say $5k-$10k to dig up a reasonably correct answer for you, and that answer was "lol this patent is a joke, Nintendo will get quickly smacked out of court and all your attorney fees will get paid for by Nintendo", then maybe that would be sufficient if the cost to you to rework the mechanic would be order(s) of magnitude higher than $5k.
You're definitely right in that before you actually call their bluff and enter litigation, you'd want to be damn sure what you're getting in to.